just after Obon; the period immediately after Obon
Refers to the days or time right after the Obon holiday (mid-August in most regions). Often used in contexts like returning to work, travel, or seasonal transitions.
See also: お盆
On the Monday just after Obon, the roads are very crowded.
Many people return to the office after Obon.
Compound of お盆 (Obon festival) + 明け (ending, just after). The prefix お is a polite marker.